(Reuters) – A drone marked with a radioactive sign was found on the roof of Japanese Prime Minister Shinzo Abe’s office on Wednesday and media said it tested positive for a “minuscule” amount of radiation.
The radiation was so low it was not harmful to humans, media quoted police as saying.
Public broadcaster NHK said the bomb squad was called in to take away the drone, which was carrying a small camera and a water bottle.
Police would investigate, government spokesman Yoshihide Suga said, adding that the country may need to consider regulating the devices.
“This situation concerns the center of Japanese government, the prime minister’s office, and we will take every necessary step, including a detailed investigation by police,” said Suga, noting how Japan had began studying the issue after a drone landed in the White House grounds in January.
Suga declined to comment further.
Abe was in Indonesia on Wednesday attending an Asia-Africa summit. An official at the prime minister’s office declined to comment.